Happened to come across this gem:
https://www.cablecenter.org/the-bar...-history-project/t-v-listings/ben-tongue.html

They made and sold vacuum TV tuners among other things. His education, how the company developed, how they got raided by the police and more.

Mr. Tongue also put together the definitive website on crystal radio, which somebody curated after is passing.
http://kearman.com/bentongue/xtalset/xtalset.html

 

Yes, they still make great products.

 

Amazing. I don't remember seeing a Blonder-Tongue product since the 1960's.

 

https://www.solidsignal.com/search?keywords=Blonder-Tongue